angel gear
noun
RareNot in standard dictionaries
1
The neutral gear when used while a vehicle is moving, especially when it is used to freewheel so as to save fuel or to coast downhill faster than a vehicle can go in gear.
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#slang
The neutral gear when used while a vehicle is moving, especially when it is used to freewheel so as to save fuel or to coast downhill faster than a vehicle can go in gear.